If Nato never gives in what will Putin do?

Vladimir Putin has always had much bigger ambitions than just seizing Ukrainian territory. He wants Nato driven back from eastern Europe, he wants disunity between the US and its Atlantic partners, he wants Russia to be a bigger power capable of knocking the US off its global perch and he wants a new order in the world, dominated by Moscow and his friend in Beijing. He has always hated America and thinks it's time the US was no longer able to dictate anything in the world. Ukraine is important to Putin but only as part of his overall plan to change the structure of the world and put himself at the top of it. It's a big, nee huge, concept and despite all the battlefield setbacks in Ukraine I reckon he still thinks he's on the way to achieving his dream. This is why he is threatening to use nuclear weapons, not to try and end the war in Ukraine like the US did in Japan in 1945, but to put the whole world, especially the western part, on notice that he is ready to resort to even the most extreme method to bring the international commúnity under his wing. It's that bold an ambition. Essentially, he wants to rule the world, and he's not really bothered about Ukraine putting up a fight. If he really wanted he could launch every ballistic missile he has left, plus the ones coming from Iran soon, to obliterate Ukraine. He is holding back in the hope that either Ukraine or Washington/Europe will cave in and play homage to him. If he doesn't get his way, I still don't think he will shelve his global dream whatever happens. Ukraine is just the first step.